Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Mean, P value and percentage changes of microhardness from baseline
| 1st Cycle of bleaching | 2nd Cycle of bleaching | 1st Cycle of remineralization | 2nd Cycle of remineralization | |
|---|---|---|---|---|
| Mean ± SD | 296.2 ± 17.3 | 290 ± 16.6 | 304.3 ± 18.5 | 307 ± 17.4 |
| P value | = 0.034 NS | <0.001 HS | <0.05 S | <0.05 S |
| Percentage changes from baseline 297.2 ± 17.6 | 0.3% Decrease | 2.3% Decrease | 2.2% Increase | 3% Increase |
SD = Standard deviation; S= Significant; HS= Highly significant
